Currently, every type of namespaces has its own counter,
which is stored in ns-specific part. Say, @net has
struct net::count, @pid has struct pid_namespace::kref, etc.
This patchset introduces unified counter for all types
of namespaces, and converts net namespace to use it first.
Signed-off-by: Kirill Tkhai <[email protected]>
---
include/linux/ns_common.h | 1 +
include/net/net_namespace.h | 11 ++++-------
net/core/net-sysfs.c | 6 +++---
net/core/net_namespace.c | 6 +++---
net/ipv4/inet_timewait_sock.c | 4 ++--
net/ipv4/tcp_metrics.c | 2 +-
6 files changed, 14 insertions(+), 16 deletions(-)
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
index 5fbc4000358f..27db02ebdf36 100644
--- a/include/linux/ns_common.h
+++ b/include/linux/ns_common.h
@@ -8,6 +8,7 @@ struct ns_common {
atomic_long_t stashed;
const struct proc_ns_operations *ops;
unsigned int inum;
+ refcount_t count;
};
#endif
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 2ee5901bec7a..cb4b33d7834b 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -60,9 +60,6 @@ struct net {
refcount_t passive; /* To decide when the network
* namespace should be freed.
*/
- refcount_t count; /* To decided when the network
- * namespace should be shut down.
- */
spinlock_t rules_mod_lock;
unsigned int dev_unreg_count;
@@ -245,7 +242,7 @@ void __put_net(struct net *net);
static inline struct net *get_net(struct net *net)
{
- refcount_inc(&net->count);
+ refcount_inc(&net->ns.count);
return net;
}
@@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
* exists. If the reference count is zero this
* function fails and returns NULL.
*/
- if (!refcount_inc_not_zero(&net->count))
+ if (!refcount_inc_not_zero(&net->ns.count))
net = NULL;
return net;
}
static inline void put_net(struct net *net)
{
- if (refcount_dec_and_test(&net->count))
+ if (refcount_dec_and_test(&net->ns.count))
__put_net(net);
}
@@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
static inline int check_net(const struct net *net)
{
- return refcount_read(&net->count) != 0;
+ return refcount_read(&net->ns.count) != 0;
}
void net_drop_ns(void *);
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 9de33b594ff2..655a88b0071c 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
while (--i >= new_num) {
struct kobject *kobj = &dev->_rx[i].kobj;
- if (!refcount_read(&dev_net(dev)->count))
+ if (!refcount_read(&dev_net(dev)->ns.count))
kobj->uevent_suppress = 1;
if (dev->sysfs_rx_queue_group)
sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
@@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
while (--i >= new_num) {
struct netdev_queue *queue = dev->_tx + i;
- if (!refcount_read(&dev_net(dev)->count))
+ if (!refcount_read(&dev_net(dev)->ns.count))
queue->kobj.uevent_suppress = 1;
#ifdef CONFIG_BQL
sysfs_remove_group(&queue->kobj, &dql_group);
@@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
{
struct device *dev = &ndev->dev;
- if (!refcount_read(&dev_net(ndev)->count))
+ if (!refcount_read(&dev_net(ndev)->ns.count))
dev_set_uevent_suppress(dev, 1);
kobject_get(&dev->kobj);
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index dcd61aca343e..5f658cbedd34 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
#endif
struct net init_net = {
- .count = REFCOUNT_INIT(1),
+ .ns.count = REFCOUNT_INIT(1),
.dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
#ifdef CONFIG_KEYS
.key_domain = &init_net_key_domain,
@@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
{
int id;
- if (refcount_read(&net->count) == 0)
+ if (refcount_read(&net->ns.count) == 0)
return NETNSA_NSID_NOT_ASSIGNED;
spin_lock(&net->nsid_lock);
@@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
int error = 0;
LIST_HEAD(net_exit_list);
- refcount_set(&net->count, 1);
+ refcount_set(&net->ns.count, 1);
refcount_set(&net->passive, 1);
get_random_bytes(&net->hash_mix, sizeof(u32));
net->dev_base_seq = 1;
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index c411c87ae865..437afe392e66 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
continue;
tw = inet_twsk(sk);
if ((tw->tw_family != family) ||
- refcount_read(&twsk_net(tw)->count))
+ refcount_read(&twsk_net(tw)->ns.count))
continue;
if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
continue;
if (unlikely((tw->tw_family != family) ||
- refcount_read(&twsk_net(tw)->count))) {
+ refcount_read(&twsk_net(tw)->ns.count))) {
inet_twsk_put(tw);
goto restart;
}
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 279db8822439..39710c417565 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
pp = &hb->chain;
for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
match = net ? net_eq(tm_net(tm), net) :
- !refcount_read(&tm_net(tm)->count);
+ !refcount_read(&tm_net(tm)->ns.count);
if (match) {
*pp = tm->tcpm_next;
kfree_rcu(tm, rcu_head);
On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
> Currently, every type of namespaces has its own counter,
> which is stored in ns-specific part. Say, @net has
> struct net::count, @pid has struct pid_namespace::kref, etc.
>
> This patchset introduces unified counter for all types
> of namespaces, and converts net namespace to use it first.
>
> Signed-off-by: Kirill Tkhai <[email protected]>
> ---
Any reason the refcount changes need to be tied to the procfs changes?
Seems that should be a separate cleanup patchset which we can take
independent of procfs changes.
Thanks!
Christian
> include/linux/ns_common.h | 1 +
> include/net/net_namespace.h | 11 ++++-------
> net/core/net-sysfs.c | 6 +++---
> net/core/net_namespace.c | 6 +++---
> net/ipv4/inet_timewait_sock.c | 4 ++--
> net/ipv4/tcp_metrics.c | 2 +-
> 6 files changed, 14 insertions(+), 16 deletions(-)
>
> diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
> index 5fbc4000358f..27db02ebdf36 100644
> --- a/include/linux/ns_common.h
> +++ b/include/linux/ns_common.h
> @@ -8,6 +8,7 @@ struct ns_common {
> atomic_long_t stashed;
> const struct proc_ns_operations *ops;
> unsigned int inum;
> + refcount_t count;
> };
>
> #endif
> diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
> index 2ee5901bec7a..cb4b33d7834b 100644
> --- a/include/net/net_namespace.h
> +++ b/include/net/net_namespace.h
> @@ -60,9 +60,6 @@ struct net {
> refcount_t passive; /* To decide when the network
> * namespace should be freed.
> */
> - refcount_t count; /* To decided when the network
> - * namespace should be shut down.
> - */
> spinlock_t rules_mod_lock;
>
> unsigned int dev_unreg_count;
> @@ -245,7 +242,7 @@ void __put_net(struct net *net);
>
> static inline struct net *get_net(struct net *net)
> {
> - refcount_inc(&net->count);
> + refcount_inc(&net->ns.count);
> return net;
> }
>
> @@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
> * exists. If the reference count is zero this
> * function fails and returns NULL.
> */
> - if (!refcount_inc_not_zero(&net->count))
> + if (!refcount_inc_not_zero(&net->ns.count))
> net = NULL;
> return net;
> }
>
> static inline void put_net(struct net *net)
> {
> - if (refcount_dec_and_test(&net->count))
> + if (refcount_dec_and_test(&net->ns.count))
> __put_net(net);
> }
>
> @@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
>
> static inline int check_net(const struct net *net)
> {
> - return refcount_read(&net->count) != 0;
> + return refcount_read(&net->ns.count) != 0;
> }
>
> void net_drop_ns(void *);
> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> index 9de33b594ff2..655a88b0071c 100644
> --- a/net/core/net-sysfs.c
> +++ b/net/core/net-sysfs.c
> @@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> while (--i >= new_num) {
> struct kobject *kobj = &dev->_rx[i].kobj;
>
> - if (!refcount_read(&dev_net(dev)->count))
> + if (!refcount_read(&dev_net(dev)->ns.count))
> kobj->uevent_suppress = 1;
> if (dev->sysfs_rx_queue_group)
> sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
> @@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> while (--i >= new_num) {
> struct netdev_queue *queue = dev->_tx + i;
>
> - if (!refcount_read(&dev_net(dev)->count))
> + if (!refcount_read(&dev_net(dev)->ns.count))
> queue->kobj.uevent_suppress = 1;
> #ifdef CONFIG_BQL
> sysfs_remove_group(&queue->kobj, &dql_group);
> @@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
> {
> struct device *dev = &ndev->dev;
>
> - if (!refcount_read(&dev_net(ndev)->count))
> + if (!refcount_read(&dev_net(ndev)->ns.count))
> dev_set_uevent_suppress(dev, 1);
>
> kobject_get(&dev->kobj);
> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> index dcd61aca343e..5f658cbedd34 100644
> --- a/net/core/net_namespace.c
> +++ b/net/core/net_namespace.c
> @@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
> #endif
>
> struct net init_net = {
> - .count = REFCOUNT_INIT(1),
> + .ns.count = REFCOUNT_INIT(1),
> .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
> #ifdef CONFIG_KEYS
> .key_domain = &init_net_key_domain,
> @@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
> {
> int id;
>
> - if (refcount_read(&net->count) == 0)
> + if (refcount_read(&net->ns.count) == 0)
> return NETNSA_NSID_NOT_ASSIGNED;
>
> spin_lock(&net->nsid_lock);
> @@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
> int error = 0;
> LIST_HEAD(net_exit_list);
>
> - refcount_set(&net->count, 1);
> + refcount_set(&net->ns.count, 1);
> refcount_set(&net->passive, 1);
> get_random_bytes(&net->hash_mix, sizeof(u32));
> net->dev_base_seq = 1;
> diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
> index c411c87ae865..437afe392e66 100644
> --- a/net/ipv4/inet_timewait_sock.c
> +++ b/net/ipv4/inet_timewait_sock.c
> @@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
> continue;
> tw = inet_twsk(sk);
> if ((tw->tw_family != family) ||
> - refcount_read(&twsk_net(tw)->count))
> + refcount_read(&twsk_net(tw)->ns.count))
> continue;
>
> if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
> continue;
>
> if (unlikely((tw->tw_family != family) ||
> - refcount_read(&twsk_net(tw)->count))) {
> + refcount_read(&twsk_net(tw)->ns.count))) {
> inet_twsk_put(tw);
> goto restart;
> }
> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
> index 279db8822439..39710c417565 100644
> --- a/net/ipv4/tcp_metrics.c
> +++ b/net/ipv4/tcp_metrics.c
> @@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
> pp = &hb->chain;
> for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
> match = net ? net_eq(tm_net(tm), net) :
> - !refcount_read(&tm_net(tm)->count);
> + !refcount_read(&tm_net(tm)->ns.count);
> if (match) {
> *pp = tm->tcpm_next;
> kfree_rcu(tm, rcu_head);
>
>
On 30.07.2020 16:35, Christian Brauner wrote:
> On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
>> Currently, every type of namespaces has its own counter,
>> which is stored in ns-specific part. Say, @net has
>> struct net::count, @pid has struct pid_namespace::kref, etc.
>>
>> This patchset introduces unified counter for all types
>> of namespaces, and converts net namespace to use it first.
>>
>> Signed-off-by: Kirill Tkhai <[email protected]>
>> ---
>
> Any reason the refcount changes need to be tied to the procfs changes?
> Seems that should be a separate cleanup patchset which we can take
> independent of procfs changes.
Yes, patches [1-8] are cleanup, it may go separately.
For me there is no a problem to resend them also as a separate patchset,
say at v2, or if there is a change in 1-8, but I'm afraid to bomb mailboxes.
If there is no a request for rework in 1-8, can they be picked directly from here?
>> include/linux/ns_common.h | 1 +
>> include/net/net_namespace.h | 11 ++++-------
>> net/core/net-sysfs.c | 6 +++---
>> net/core/net_namespace.c | 6 +++---
>> net/ipv4/inet_timewait_sock.c | 4 ++--
>> net/ipv4/tcp_metrics.c | 2 +-
>> 6 files changed, 14 insertions(+), 16 deletions(-)
>>
>> diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
>> index 5fbc4000358f..27db02ebdf36 100644
>> --- a/include/linux/ns_common.h
>> +++ b/include/linux/ns_common.h
>> @@ -8,6 +8,7 @@ struct ns_common {
>> atomic_long_t stashed;
>> const struct proc_ns_operations *ops;
>> unsigned int inum;
>> + refcount_t count;
>> };
>>
>> #endif
>> diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
>> index 2ee5901bec7a..cb4b33d7834b 100644
>> --- a/include/net/net_namespace.h
>> +++ b/include/net/net_namespace.h
>> @@ -60,9 +60,6 @@ struct net {
>> refcount_t passive; /* To decide when the network
>> * namespace should be freed.
>> */
>> - refcount_t count; /* To decided when the network
>> - * namespace should be shut down.
>> - */
>> spinlock_t rules_mod_lock;
>>
>> unsigned int dev_unreg_count;
>> @@ -245,7 +242,7 @@ void __put_net(struct net *net);
>>
>> static inline struct net *get_net(struct net *net)
>> {
>> - refcount_inc(&net->count);
>> + refcount_inc(&net->ns.count);
>> return net;
>> }
>>
>> @@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
>> * exists. If the reference count is zero this
>> * function fails and returns NULL.
>> */
>> - if (!refcount_inc_not_zero(&net->count))
>> + if (!refcount_inc_not_zero(&net->ns.count))
>> net = NULL;
>> return net;
>> }
>>
>> static inline void put_net(struct net *net)
>> {
>> - if (refcount_dec_and_test(&net->count))
>> + if (refcount_dec_and_test(&net->ns.count))
>> __put_net(net);
>> }
>>
>> @@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
>>
>> static inline int check_net(const struct net *net)
>> {
>> - return refcount_read(&net->count) != 0;
>> + return refcount_read(&net->ns.count) != 0;
>> }
>>
>> void net_drop_ns(void *);
>> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
>> index 9de33b594ff2..655a88b0071c 100644
>> --- a/net/core/net-sysfs.c
>> +++ b/net/core/net-sysfs.c
>> @@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
>> while (--i >= new_num) {
>> struct kobject *kobj = &dev->_rx[i].kobj;
>>
>> - if (!refcount_read(&dev_net(dev)->count))
>> + if (!refcount_read(&dev_net(dev)->ns.count))
>> kobj->uevent_suppress = 1;
>> if (dev->sysfs_rx_queue_group)
>> sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
>> @@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
>> while (--i >= new_num) {
>> struct netdev_queue *queue = dev->_tx + i;
>>
>> - if (!refcount_read(&dev_net(dev)->count))
>> + if (!refcount_read(&dev_net(dev)->ns.count))
>> queue->kobj.uevent_suppress = 1;
>> #ifdef CONFIG_BQL
>> sysfs_remove_group(&queue->kobj, &dql_group);
>> @@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
>> {
>> struct device *dev = &ndev->dev;
>>
>> - if (!refcount_read(&dev_net(ndev)->count))
>> + if (!refcount_read(&dev_net(ndev)->ns.count))
>> dev_set_uevent_suppress(dev, 1);
>>
>> kobject_get(&dev->kobj);
>> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
>> index dcd61aca343e..5f658cbedd34 100644
>> --- a/net/core/net_namespace.c
>> +++ b/net/core/net_namespace.c
>> @@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
>> #endif
>>
>> struct net init_net = {
>> - .count = REFCOUNT_INIT(1),
>> + .ns.count = REFCOUNT_INIT(1),
>> .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
>> #ifdef CONFIG_KEYS
>> .key_domain = &init_net_key_domain,
>> @@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
>> {
>> int id;
>>
>> - if (refcount_read(&net->count) == 0)
>> + if (refcount_read(&net->ns.count) == 0)
>> return NETNSA_NSID_NOT_ASSIGNED;
>>
>> spin_lock(&net->nsid_lock);
>> @@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
>> int error = 0;
>> LIST_HEAD(net_exit_list);
>>
>> - refcount_set(&net->count, 1);
>> + refcount_set(&net->ns.count, 1);
>> refcount_set(&net->passive, 1);
>> get_random_bytes(&net->hash_mix, sizeof(u32));
>> net->dev_base_seq = 1;
>> diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
>> index c411c87ae865..437afe392e66 100644
>> --- a/net/ipv4/inet_timewait_sock.c
>> +++ b/net/ipv4/inet_timewait_sock.c
>> @@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
>> continue;
>> tw = inet_twsk(sk);
>> if ((tw->tw_family != family) ||
>> - refcount_read(&twsk_net(tw)->count))
>> + refcount_read(&twsk_net(tw)->ns.count))
>> continue;
>>
>> if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
>> continue;
>>
>> if (unlikely((tw->tw_family != family) ||
>> - refcount_read(&twsk_net(tw)->count))) {
>> + refcount_read(&twsk_net(tw)->ns.count))) {
>> inet_twsk_put(tw);
>> goto restart;
>> }
>> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
>> index 279db8822439..39710c417565 100644
>> --- a/net/ipv4/tcp_metrics.c
>> +++ b/net/ipv4/tcp_metrics.c
>> @@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
>> pp = &hb->chain;
>> for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
>> match = net ? net_eq(tm_net(tm), net) :
>> - !refcount_read(&tm_net(tm)->count);
>> + !refcount_read(&tm_net(tm)->ns.count);
>> if (match) {
>> *pp = tm->tcpm_next;
>> kfree_rcu(tm, rcu_head);
>>
>>
On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
> Currently, every type of namespaces has its own counter,
> which is stored in ns-specific part. Say, @net has
> struct net::count, @pid has struct pid_namespace::kref, etc.
>
> This patchset introduces unified counter for all types
> of namespaces, and converts net namespace to use it first.
>
> Signed-off-by: Kirill Tkhai <[email protected]>
> ---
> include/linux/ns_common.h | 1 +
> include/net/net_namespace.h | 11 ++++-------
> net/core/net-sysfs.c | 6 +++---
> net/core/net_namespace.c | 6 +++---
> net/ipv4/inet_timewait_sock.c | 4 ++--
> net/ipv4/tcp_metrics.c | 2 +-
> 6 files changed, 14 insertions(+), 16 deletions(-)
>
> diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
> index 5fbc4000358f..27db02ebdf36 100644
> --- a/include/linux/ns_common.h
> +++ b/include/linux/ns_common.h
> @@ -8,6 +8,7 @@ struct ns_common {
> atomic_long_t stashed;
> const struct proc_ns_operations *ops;
> unsigned int inum;
> + refcount_t count;
Hm, I wonder whether it's worth to have this addition be in a separate
patch but probably not and even if there'd be no need to resend.
Though I wonder, isn't this missing an include for refcount_t or is
there some header-magic we're doing during pre-processing?
Acked-by: Christian Brauner <[email protected]>
Thanks!
Christian
> };
>
> #endif
> diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
> index 2ee5901bec7a..cb4b33d7834b 100644
> --- a/include/net/net_namespace.h
> +++ b/include/net/net_namespace.h
> @@ -60,9 +60,6 @@ struct net {
> refcount_t passive; /* To decide when the network
> * namespace should be freed.
> */
> - refcount_t count; /* To decided when the network
> - * namespace should be shut down.
> - */
> spinlock_t rules_mod_lock;
>
> unsigned int dev_unreg_count;
> @@ -245,7 +242,7 @@ void __put_net(struct net *net);
>
> static inline struct net *get_net(struct net *net)
> {
> - refcount_inc(&net->count);
> + refcount_inc(&net->ns.count);
> return net;
> }
>
> @@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
> * exists. If the reference count is zero this
> * function fails and returns NULL.
> */
> - if (!refcount_inc_not_zero(&net->count))
> + if (!refcount_inc_not_zero(&net->ns.count))
> net = NULL;
> return net;
> }
>
> static inline void put_net(struct net *net)
> {
> - if (refcount_dec_and_test(&net->count))
> + if (refcount_dec_and_test(&net->ns.count))
> __put_net(net);
> }
>
> @@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
>
> static inline int check_net(const struct net *net)
> {
> - return refcount_read(&net->count) != 0;
> + return refcount_read(&net->ns.count) != 0;
> }
>
> void net_drop_ns(void *);
> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> index 9de33b594ff2..655a88b0071c 100644
> --- a/net/core/net-sysfs.c
> +++ b/net/core/net-sysfs.c
> @@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> while (--i >= new_num) {
> struct kobject *kobj = &dev->_rx[i].kobj;
>
> - if (!refcount_read(&dev_net(dev)->count))
> + if (!refcount_read(&dev_net(dev)->ns.count))
> kobj->uevent_suppress = 1;
> if (dev->sysfs_rx_queue_group)
> sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
> @@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> while (--i >= new_num) {
> struct netdev_queue *queue = dev->_tx + i;
>
> - if (!refcount_read(&dev_net(dev)->count))
> + if (!refcount_read(&dev_net(dev)->ns.count))
> queue->kobj.uevent_suppress = 1;
> #ifdef CONFIG_BQL
> sysfs_remove_group(&queue->kobj, &dql_group);
> @@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
> {
> struct device *dev = &ndev->dev;
>
> - if (!refcount_read(&dev_net(ndev)->count))
> + if (!refcount_read(&dev_net(ndev)->ns.count))
> dev_set_uevent_suppress(dev, 1);
>
> kobject_get(&dev->kobj);
> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> index dcd61aca343e..5f658cbedd34 100644
> --- a/net/core/net_namespace.c
> +++ b/net/core/net_namespace.c
> @@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
> #endif
>
> struct net init_net = {
> - .count = REFCOUNT_INIT(1),
> + .ns.count = REFCOUNT_INIT(1),
> .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
> #ifdef CONFIG_KEYS
> .key_domain = &init_net_key_domain,
> @@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
> {
> int id;
>
> - if (refcount_read(&net->count) == 0)
> + if (refcount_read(&net->ns.count) == 0)
> return NETNSA_NSID_NOT_ASSIGNED;
>
> spin_lock(&net->nsid_lock);
> @@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
> int error = 0;
> LIST_HEAD(net_exit_list);
>
> - refcount_set(&net->count, 1);
> + refcount_set(&net->ns.count, 1);
> refcount_set(&net->passive, 1);
> get_random_bytes(&net->hash_mix, sizeof(u32));
> net->dev_base_seq = 1;
> diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
> index c411c87ae865..437afe392e66 100644
> --- a/net/ipv4/inet_timewait_sock.c
> +++ b/net/ipv4/inet_timewait_sock.c
> @@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
> continue;
> tw = inet_twsk(sk);
> if ((tw->tw_family != family) ||
> - refcount_read(&twsk_net(tw)->count))
> + refcount_read(&twsk_net(tw)->ns.count))
> continue;
>
> if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
> continue;
>
> if (unlikely((tw->tw_family != family) ||
> - refcount_read(&twsk_net(tw)->count))) {
> + refcount_read(&twsk_net(tw)->ns.count))) {
> inet_twsk_put(tw);
> goto restart;
> }
> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
> index 279db8822439..39710c417565 100644
> --- a/net/ipv4/tcp_metrics.c
> +++ b/net/ipv4/tcp_metrics.c
> @@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
> pp = &hb->chain;
> for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
> match = net ? net_eq(tm_net(tm), net) :
> - !refcount_read(&tm_net(tm)->count);
> + !refcount_read(&tm_net(tm)->ns.count);
> if (match) {
> *pp = tm->tcpm_next;
> kfree_rcu(tm, rcu_head);
>
>
On 30.07.2020 17:30, Christian Brauner wrote:
> On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
>> Currently, every type of namespaces has its own counter,
>> which is stored in ns-specific part. Say, @net has
>> struct net::count, @pid has struct pid_namespace::kref, etc.
>>
>> This patchset introduces unified counter for all types
>> of namespaces, and converts net namespace to use it first.
>>
>> Signed-off-by: Kirill Tkhai <[email protected]>
>> ---
>> include/linux/ns_common.h | 1 +
>> include/net/net_namespace.h | 11 ++++-------
>> net/core/net-sysfs.c | 6 +++---
>> net/core/net_namespace.c | 6 +++---
>> net/ipv4/inet_timewait_sock.c | 4 ++--
>> net/ipv4/tcp_metrics.c | 2 +-
>> 6 files changed, 14 insertions(+), 16 deletions(-)
>>
>> diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
>> index 5fbc4000358f..27db02ebdf36 100644
>> --- a/include/linux/ns_common.h
>> +++ b/include/linux/ns_common.h
>> @@ -8,6 +8,7 @@ struct ns_common {
>> atomic_long_t stashed;
>> const struct proc_ns_operations *ops;
>> unsigned int inum;
>> + refcount_t count;
>
> Hm, I wonder whether it's worth to have this addition be in a separate
> patch but probably not and even if there'd be no need to resend.
>
> Though I wonder, isn't this missing an include for refcount_t or is
> there some header-magic we're doing during pre-processing?
We have to add, I think. I'll resend with #include <linux/refcount.h>
in this file. Can I keep your Ack here on resend?
> Acked-by: Christian Brauner <[email protected]>
>
> Thanks!
> Christian
>
>> };
>>
>> #endif
>> diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
>> index 2ee5901bec7a..cb4b33d7834b 100644
>> --- a/include/net/net_namespace.h
>> +++ b/include/net/net_namespace.h
>> @@ -60,9 +60,6 @@ struct net {
>> refcount_t passive; /* To decide when the network
>> * namespace should be freed.
>> */
>> - refcount_t count; /* To decided when the network
>> - * namespace should be shut down.
>> - */
>> spinlock_t rules_mod_lock;
>>
>> unsigned int dev_unreg_count;
>> @@ -245,7 +242,7 @@ void __put_net(struct net *net);
>>
>> static inline struct net *get_net(struct net *net)
>> {
>> - refcount_inc(&net->count);
>> + refcount_inc(&net->ns.count);
>> return net;
>> }
>>
>> @@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
>> * exists. If the reference count is zero this
>> * function fails and returns NULL.
>> */
>> - if (!refcount_inc_not_zero(&net->count))
>> + if (!refcount_inc_not_zero(&net->ns.count))
>> net = NULL;
>> return net;
>> }
>>
>> static inline void put_net(struct net *net)
>> {
>> - if (refcount_dec_and_test(&net->count))
>> + if (refcount_dec_and_test(&net->ns.count))
>> __put_net(net);
>> }
>>
>> @@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
>>
>> static inline int check_net(const struct net *net)
>> {
>> - return refcount_read(&net->count) != 0;
>> + return refcount_read(&net->ns.count) != 0;
>> }
>>
>> void net_drop_ns(void *);
>> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
>> index 9de33b594ff2..655a88b0071c 100644
>> --- a/net/core/net-sysfs.c
>> +++ b/net/core/net-sysfs.c
>> @@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
>> while (--i >= new_num) {
>> struct kobject *kobj = &dev->_rx[i].kobj;
>>
>> - if (!refcount_read(&dev_net(dev)->count))
>> + if (!refcount_read(&dev_net(dev)->ns.count))
>> kobj->uevent_suppress = 1;
>> if (dev->sysfs_rx_queue_group)
>> sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
>> @@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
>> while (--i >= new_num) {
>> struct netdev_queue *queue = dev->_tx + i;
>>
>> - if (!refcount_read(&dev_net(dev)->count))
>> + if (!refcount_read(&dev_net(dev)->ns.count))
>> queue->kobj.uevent_suppress = 1;
>> #ifdef CONFIG_BQL
>> sysfs_remove_group(&queue->kobj, &dql_group);
>> @@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
>> {
>> struct device *dev = &ndev->dev;
>>
>> - if (!refcount_read(&dev_net(ndev)->count))
>> + if (!refcount_read(&dev_net(ndev)->ns.count))
>> dev_set_uevent_suppress(dev, 1);
>>
>> kobject_get(&dev->kobj);
>> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
>> index dcd61aca343e..5f658cbedd34 100644
>> --- a/net/core/net_namespace.c
>> +++ b/net/core/net_namespace.c
>> @@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
>> #endif
>>
>> struct net init_net = {
>> - .count = REFCOUNT_INIT(1),
>> + .ns.count = REFCOUNT_INIT(1),
>> .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
>> #ifdef CONFIG_KEYS
>> .key_domain = &init_net_key_domain,
>> @@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
>> {
>> int id;
>>
>> - if (refcount_read(&net->count) == 0)
>> + if (refcount_read(&net->ns.count) == 0)
>> return NETNSA_NSID_NOT_ASSIGNED;
>>
>> spin_lock(&net->nsid_lock);
>> @@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
>> int error = 0;
>> LIST_HEAD(net_exit_list);
>>
>> - refcount_set(&net->count, 1);
>> + refcount_set(&net->ns.count, 1);
>> refcount_set(&net->passive, 1);
>> get_random_bytes(&net->hash_mix, sizeof(u32));
>> net->dev_base_seq = 1;
>> diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
>> index c411c87ae865..437afe392e66 100644
>> --- a/net/ipv4/inet_timewait_sock.c
>> +++ b/net/ipv4/inet_timewait_sock.c
>> @@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
>> continue;
>> tw = inet_twsk(sk);
>> if ((tw->tw_family != family) ||
>> - refcount_read(&twsk_net(tw)->count))
>> + refcount_read(&twsk_net(tw)->ns.count))
>> continue;
>>
>> if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
>> continue;
>>
>> if (unlikely((tw->tw_family != family) ||
>> - refcount_read(&twsk_net(tw)->count))) {
>> + refcount_read(&twsk_net(tw)->ns.count))) {
>> inet_twsk_put(tw);
>> goto restart;
>> }
>> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
>> index 279db8822439..39710c417565 100644
>> --- a/net/ipv4/tcp_metrics.c
>> +++ b/net/ipv4/tcp_metrics.c
>> @@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
>> pp = &hb->chain;
>> for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
>> match = net ? net_eq(tm_net(tm), net) :
>> - !refcount_read(&tm_net(tm)->count);
>> + !refcount_read(&tm_net(tm)->ns.count);
>> if (match) {
>> *pp = tm->tcpm_next;
>> kfree_rcu(tm, rcu_head);
>>
>>
On Thu, Jul 30, 2020 at 05:34:28PM +0300, Kirill Tkhai wrote:
> On 30.07.2020 17:30, Christian Brauner wrote:
> > On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
> >> Currently, every type of namespaces has its own counter,
> >> which is stored in ns-specific part. Say, @net has
> >> struct net::count, @pid has struct pid_namespace::kref, etc.
> >>
> >> This patchset introduces unified counter for all types
> >> of namespaces, and converts net namespace to use it first.
> >>
> >> Signed-off-by: Kirill Tkhai <[email protected]>
> >> ---
> >> include/linux/ns_common.h | 1 +
> >> include/net/net_namespace.h | 11 ++++-------
> >> net/core/net-sysfs.c | 6 +++---
> >> net/core/net_namespace.c | 6 +++---
> >> net/ipv4/inet_timewait_sock.c | 4 ++--
> >> net/ipv4/tcp_metrics.c | 2 +-
> >> 6 files changed, 14 insertions(+), 16 deletions(-)
> >>
> >> diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
> >> index 5fbc4000358f..27db02ebdf36 100644
> >> --- a/include/linux/ns_common.h
> >> +++ b/include/linux/ns_common.h
> >> @@ -8,6 +8,7 @@ struct ns_common {
> >> atomic_long_t stashed;
> >> const struct proc_ns_operations *ops;
> >> unsigned int inum;
> >> + refcount_t count;
> >
> > Hm, I wonder whether it's worth to have this addition be in a separate
> > patch but probably not and even if there'd be no need to resend.
> >
> > Though I wonder, isn't this missing an include for refcount_t or is
> > there some header-magic we're doing during pre-processing?
>
> We have to add, I think. I'll resend with #include <linux/refcount.h>
> in this file. Can I keep your Ack here on resend?
Sure.
>
> > Acked-by: Christian Brauner <[email protected]>
> >
> > Thanks!
> > Christian
> >
> >> };
> >>
> >> #endif
> >> diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
> >> index 2ee5901bec7a..cb4b33d7834b 100644
> >> --- a/include/net/net_namespace.h
> >> +++ b/include/net/net_namespace.h
> >> @@ -60,9 +60,6 @@ struct net {
> >> refcount_t passive; /* To decide when the network
> >> * namespace should be freed.
> >> */
> >> - refcount_t count; /* To decided when the network
> >> - * namespace should be shut down.
> >> - */
> >> spinlock_t rules_mod_lock;
> >>
> >> unsigned int dev_unreg_count;
> >> @@ -245,7 +242,7 @@ void __put_net(struct net *net);
> >>
> >> static inline struct net *get_net(struct net *net)
> >> {
> >> - refcount_inc(&net->count);
> >> + refcount_inc(&net->ns.count);
> >> return net;
> >> }
> >>
> >> @@ -256,14 +253,14 @@ static inline struct net *maybe_get_net(struct net *net)
> >> * exists. If the reference count is zero this
> >> * function fails and returns NULL.
> >> */
> >> - if (!refcount_inc_not_zero(&net->count))
> >> + if (!refcount_inc_not_zero(&net->ns.count))
> >> net = NULL;
> >> return net;
> >> }
> >>
> >> static inline void put_net(struct net *net)
> >> {
> >> - if (refcount_dec_and_test(&net->count))
> >> + if (refcount_dec_and_test(&net->ns.count))
> >> __put_net(net);
> >> }
> >>
> >> @@ -275,7 +272,7 @@ int net_eq(const struct net *net1, const struct net *net2)
> >>
> >> static inline int check_net(const struct net *net)
> >> {
> >> - return refcount_read(&net->count) != 0;
> >> + return refcount_read(&net->ns.count) != 0;
> >> }
> >>
> >> void net_drop_ns(void *);
> >> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> >> index 9de33b594ff2..655a88b0071c 100644
> >> --- a/net/core/net-sysfs.c
> >> +++ b/net/core/net-sysfs.c
> >> @@ -1025,7 +1025,7 @@ net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> >> while (--i >= new_num) {
> >> struct kobject *kobj = &dev->_rx[i].kobj;
> >>
> >> - if (!refcount_read(&dev_net(dev)->count))
> >> + if (!refcount_read(&dev_net(dev)->ns.count))
> >> kobj->uevent_suppress = 1;
> >> if (dev->sysfs_rx_queue_group)
> >> sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
> >> @@ -1603,7 +1603,7 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
> >> while (--i >= new_num) {
> >> struct netdev_queue *queue = dev->_tx + i;
> >>
> >> - if (!refcount_read(&dev_net(dev)->count))
> >> + if (!refcount_read(&dev_net(dev)->ns.count))
> >> queue->kobj.uevent_suppress = 1;
> >> #ifdef CONFIG_BQL
> >> sysfs_remove_group(&queue->kobj, &dql_group);
> >> @@ -1850,7 +1850,7 @@ void netdev_unregister_kobject(struct net_device *ndev)
> >> {
> >> struct device *dev = &ndev->dev;
> >>
> >> - if (!refcount_read(&dev_net(ndev)->count))
> >> + if (!refcount_read(&dev_net(ndev)->ns.count))
> >> dev_set_uevent_suppress(dev, 1);
> >>
> >> kobject_get(&dev->kobj);
> >> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> >> index dcd61aca343e..5f658cbedd34 100644
> >> --- a/net/core/net_namespace.c
> >> +++ b/net/core/net_namespace.c
> >> @@ -44,7 +44,7 @@ static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
> >> #endif
> >>
> >> struct net init_net = {
> >> - .count = REFCOUNT_INIT(1),
> >> + .ns.count = REFCOUNT_INIT(1),
> >> .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
> >> #ifdef CONFIG_KEYS
> >> .key_domain = &init_net_key_domain,
> >> @@ -248,7 +248,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
> >> {
> >> int id;
> >>
> >> - if (refcount_read(&net->count) == 0)
> >> + if (refcount_read(&net->ns.count) == 0)
> >> return NETNSA_NSID_NOT_ASSIGNED;
> >>
> >> spin_lock(&net->nsid_lock);
> >> @@ -328,7 +328,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
> >> int error = 0;
> >> LIST_HEAD(net_exit_list);
> >>
> >> - refcount_set(&net->count, 1);
> >> + refcount_set(&net->ns.count, 1);
> >> refcount_set(&net->passive, 1);
> >> get_random_bytes(&net->hash_mix, sizeof(u32));
> >> net->dev_base_seq = 1;
> >> diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
> >> index c411c87ae865..437afe392e66 100644
> >> --- a/net/ipv4/inet_timewait_sock.c
> >> +++ b/net/ipv4/inet_timewait_sock.c
> >> @@ -272,14 +272,14 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
> >> continue;
> >> tw = inet_twsk(sk);
> >> if ((tw->tw_family != family) ||
> >> - refcount_read(&twsk_net(tw)->count))
> >> + refcount_read(&twsk_net(tw)->ns.count))
> >> continue;
> >>
> >> if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
> >> continue;
> >>
> >> if (unlikely((tw->tw_family != family) ||
> >> - refcount_read(&twsk_net(tw)->count))) {
> >> + refcount_read(&twsk_net(tw)->ns.count))) {
> >> inet_twsk_put(tw);
> >> goto restart;
> >> }
> >> diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
> >> index 279db8822439..39710c417565 100644
> >> --- a/net/ipv4/tcp_metrics.c
> >> +++ b/net/ipv4/tcp_metrics.c
> >> @@ -887,7 +887,7 @@ static void tcp_metrics_flush_all(struct net *net)
> >> pp = &hb->chain;
> >> for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) {
> >> match = net ? net_eq(tm_net(tm), net) :
> >> - !refcount_read(&tm_net(tm)->count);
> >> + !refcount_read(&tm_net(tm)->ns.count);
> >> if (match) {
> >> *pp = tm->tcpm_next;
> >> kfree_rcu(tm, rcu_head);
> >>
> >>
>
On Thu, Jul 30, 2020 at 05:07:05PM +0300, Kirill Tkhai wrote:
> On 30.07.2020 16:35, Christian Brauner wrote:
> > On Thu, Jul 30, 2020 at 02:59:25PM +0300, Kirill Tkhai wrote:
> >> Currently, every type of namespaces has its own counter,
> >> which is stored in ns-specific part. Say, @net has
> >> struct net::count, @pid has struct pid_namespace::kref, etc.
> >>
> >> This patchset introduces unified counter for all types
> >> of namespaces, and converts net namespace to use it first.
> >>
> >> Signed-off-by: Kirill Tkhai <[email protected]>
> >> ---
> >
> > Any reason the refcount changes need to be tied to the procfs changes?
> > Seems that should be a separate cleanup patchset which we can take
> > independent of procfs changes.
>
> Yes, patches [1-8] are cleanup, it may go separately.
>
> For me there is no a problem to resend them also as a separate patchset,
> say at v2, or if there is a change in 1-8, but I'm afraid to bomb mailboxes.
>
> If there is no a request for rework in 1-8, can they be picked directly from here?
Apart from the missing include that might be an issue in ns_common.h
this looks fine to me and seems like a good cleanup overall. Afaict it
even loses more code than it adds.
I think resending this part separately is worth it given that we're not
sure whether this series will be part of procfs or a spearate thing.
This won't make it for the merge window of course but unless there are
technical issues with this conversion I'd pick this up for later.
Thanks!
Christian